Hi I'm trying to send an image file on the server to print from client default printer. I see that System.Drawing.Printing has a PrintDocument control. Can this control be used to attain my purpose? Or is there an alternative to achieve my aim? -- Regards Patsy...more >>

I'm using a Windows Media Player control in a Windows Form. I've been able to capture the currently displayed frame by using a BitBlt operation. What I'm looking to do now is to set the uiMode to Full so that I get the WMP's buttons and sliders to appear. If stretchToFit is set to false, th...more >>

With the code below, I get either a generic error in GDI+ or an out of memory error when trying to preview a report, using the .NET PrintDocument. This error usually shows up around page 4913 at roughly 275,000 lines or so. I'm attempting to print 58 lines per page. When printing (to a pdf p...more >>

hello: I have a bitmap saved in photoshop with 32 bit and alpha information but when load the bitmap with Bitmap class the result of PixelFormat function always return PixelFormat32bppRGB instead PixelFormat32bppARGB, why this happend and who can I get the alpha informatio of this bitmap to dr...more >>

Is it possible to add a GraphicsPath to an existing GraphicsPath? I have several lines Widen()'ed by different pens. I want to add them all to the same GraphicsPath. Or do I have to store an inidividual GraphicsPath for every line segment I create? I fear this might take up a lot of resour...more >>

I liked the look of the Window Media Player form. I have no idea on how to begin to create forms like that, though I have done basic forms. Could you give me a web site on this topic? thx! -- Message posted via http://www.dotnetmonster.com...more >>

How do i extract all images from a multi-tiff image object and= combine them into one image object using ASP=2ENet? The target= object would be a normal or non-multi-tiff image at this point=2E = My code works to the point of getting the tiff from a database,= looping through and pulling ou...more >>

Hi, Compressing a tiff-image from file using the following code is working fine: ImageCodecInfo myCodecInfo = GetCodecInfo("image/tiff"); Bitmap objImage = new Bitmap(drRow[FieldName].ToString().Trim()); EncoderParameters CodecParams = new EncoderParameters(1); CodecParams .Param[0] = n...more >>

Hi, I'm trying to draw a border around my form that redraws on form resize. Can someone please tell me 1/ How do I find the 'internal' dimensions of the form? I wish to draw it around the usable area of the form. The rectangle below is not centred. 2/ How do I repaint the form on resize t...more >>

Can anyone give me a hint how I can save a drawing as an EMF (Vector) file. The following simple example gives an error. If I create the drawing tru a Bitmap object then it saves the file but as a rasterized image (not vector). Any help is appreciated: Dim g As Graphics Di...more >>

I have found a probable bug when you draw with GDI. Look this simple code '*************************** Private WithEvents tmr As Timer Private Sub Form1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint Const Zoom As Sing...more >>

hi all, i need to print a picture box where i actually draw my own picture. That would be a combination of a few strings and a few lines. I can print the picture box at the printer, however, any graphics inside the picture box would not show up. I kinda undrestand now why this is happening .....more >>

I am walking through some of the very first sample code from the book "Beginning .NET Game Programming" from Apress. I identify his sample code with //SC This code puzzles me: Graphics graph = new Graphics //SC // first of all there is no constructor for Graphics // so in the Form_P...more >>

Hi, I'm currently developing a set of custom controls for a client. Everything is themeable, yadda yadda. I have my own "PictureLargePreview" control which accepts a bunch of Pictures (a threaded extension on top of munch of bitmaps for preview etc). And will display them in a list. With ...more >>

Does ne one know howto mark a point on an image placed in the picture box.In VB6.0 Pset porperty does this.Ne alternative for this in VB.net? -- Message posted via http://www.dotnetmonster.com...more >>

I have some code that draws small images which really are icons onto menu items. After doing this with DrawImage, I found the Graphics.DrawIcon method. Is there an advantage to this DrawIcon that would make it worth changing my code, since drawing icons is really what I'm doing? -Rachel ...more >>

Before I dive headfirst into this one, I'd like to hear some oppinions: I have a list of images, displayed in a ListBox. The images are quite small, say 100*100 px tops. Now, I want to create a MouseOver effect where the image that is hovered over is displayed as through a magnifying glass...more >>

I am trying to create a bar code in a vb.net app, but the pen alignment right does not have any effect. Any ideas? ...more >>

I am trying to draw a triangle on a toolbarbutton to simulate a drop down button without having the extra button beside my drop downbutton. I was successfully able to draw the triangle by overrriding the onpaint event for the form. that only problem is when I click on the button ( a context menu...more >>

Hi there, I'm using colour matrices to attempt to colourize a bitmap. I would like to try to make any bitmap the same "hue" so to speak as the system's button face colour. This way I can match the colour scheme automatically. I was thinking that I might need to transform the imag...more >>

Is there a technical definition for the term grayscale? Would an indexed image (1,2,4,8 or 16bpp) be considered grayscale if all the colors in the pallete are true shades of gray? Could a 24bpp image be considered grayscale? We're trying to print some TIFF images with a high speed printing ve...more >>

Hi all, I am having a little difficulty... I am trying to merge two images togethor, but I am getting "Invalid parameter used". I have created a seperate class file, set up properties and a method. I am calling it from aspx, the calling works OK, but the return just doesn't work. ...more >>

Hi, I have a control which, among other things, draws a solid rectangle using FillRectangle(). The brush used to fill is a SolidBrush created from KnownColor.Control. When this code executes using a Graphics created by CreateGraphics, the rectangle is exactly the same colour as the backgrou...more >>

It seems there is something like Screen.Dpi property? But I could not found one. Is there an easy way to get the DPI? Thanks! ...more >>

Hi folks, when printing images, I'd like to extract a user-selection and paint several copies (i.e. passport-photos) onto a single page. Thus I'm creating a new bitmap and paint the "view port" on it as many times as appropriate. But - in order to center and scale the "items" accordingly I'd ...more >>

I am attempting to write a program that will take many 1BPP Group 4 CCITT images and downres them from 36"x24" at 400 DPI to 36"x24" at 200DPI. I got as far as to create the new bitmap object and then when I tried to convert it into a graphics object (graphics.fromimage()), I got an error "A Grap...more >>

The following works fine: EncoderParameters encoderParameters = new EncoderParameters(1); encoderParameters.Param[0] = new EncoderParameter(Encoder.Quality, 100L); image.Save(httpContext.Response.OutputStream, GetEncoder(contentMime), encoderParameters); This does not: EncoderParameters ...more >>

What is the difference between implementing OnPaintBackground method instead of OnPaint method in a form? I use the first method to draw only the background image of my Windows Form and OnPaint to draw standard graphics on the form surface (lines, other images, texts). I'm looking for th...more >>

Hi, How can I convert a color bitmap into black&white one. I tried this: Bitmap b=(Bitmap)Bitmap.FromFile(dlg.FileName,false); Bitmap bw=b.Clone(new Rectangle(0,0,b.Width,b.Height),PixelFormat.Format1bppIndexed); but and "Out of memory exception" is thrown. Note that if I change the pix...more >>

I am trying to build an inherited tabcontrol in vb.net that among other things, rounds off the rectangles for the tabs, makes them slighly taller and wider, and puts a little space between each tab. I am using SetStyle(ControlStyles.AllPaintingInWmPaint Or ControlStyles.ResizeRedraw Or...more >>

Hi developers, I need to synchronize the moving/scrolling of 4 images in a window. So I started to write my own image control that inherits from the panel object. I overrid the WndProc to capture the Scroll messages and create a new delegate: protected override void WndProc(ref Message m)...more >>

If I draw on the form using OnPaint and GDI+ methods, what is the faster format to use for drawing images? Bitmap or jpeg? Thanks in advance, Pino. ...more >>

Was trying to draw an image using "best fit" code right off of Bob Powell's FAQ. The aspect ratio of the panel was pretty close to that of the image, so the image should have filled most of the panel, but instead was entirely drawn within the top left quarter of the panel. Something similar has ...more >>

Hi, I was recently trying to create my own fully custom form, and I was hoping I could either remove and add my own close/min/max buttons, or redraw the close/min/max buttons that are the defaults in System.Windows.Forms.Form. Any helpful hints? Thank you, Ben ...more >>

hi, In my application I want the user to be able to draw a Line or Rectangle by selecting an item from the toolbar. And so , Obviously I have to write the code in the mouseDown,MouseMove Event of the pictureBox. Could anybody please suggest me where will I get the graphics object here as ...more >>

Hi, I am trying to apply gray scaling to color as well as black/white images. I have tried using the pixel by pixel approach to achieve the scaling. But the particular approach has a issue with high mega pixel images. Is there any other approach that can be applied to achieve the ...more >>

Why this two method with same data generate different fonts ? Graphics.DrawString generate a correct font, but Drawing2D.GraphicsPath.AddString generate a terrible font (specially if font is small). Code example Private Sub Form_Paint(ByVal sender As Object, ByVal e As System.Wind...more >>

Hi all, I have a ruler control that is a PictureBox inside of a UserControl which I use for scrolling the ruler. Originally, this code was developed as a bitmap inside of a UserControl (no scrolling). Each time the mouse was moved, the bitmap would be repainted along with the little tracker l...more >>

Hi to All, I have a working printdocument, how can I use it to draw it's contents (pages) only to a inmemory graphics object and not to a printer or printpreview? thx for answers. ...more >>

Hi folks, I'd like to display a loaded image's properties (i.e. resolution, date when the picture was taken, camera that was used, etc.) using VB.Net. Any pointers as to how to get them? TIA & cheers, Olaf...more >>

Hello. I am scanning some old oversized legal documents.(24x32 in) The requirement is to go into Ultima TitleSearch. This software only supports Group4 tif files. To get the best quality image possible we are scanning in 8-bit color on a blueprint scanner. Next we automate a batch in Photoshop...more >>

I am so frustrated... I've gone over & over the calculations (which are simple) for the parameters, and tried a couple different ways to do this, but always my result seems to be distorted. Can I really have messed up these 10th grade calculations? Or is there something fundamental I'm missing a...more >>

I have a bitmap that I want to display on a form. When I use: <graphics>.DrawImage(bmp, new Rectangle(10, 10, bmp.Width, bmp.Height)) - everything works as expected. But if I use: DrawImage(bmp, new Rectangle(10, 10, bmp.Width * 10, bmp.Height * 10)) the width of first column on the image is ha...more >>

Hi, What's the simplest way to draw a semi-transparent (alpha blended) line? I can draw alpha-blended images using the ImageAttributes parameter of the DrawImage method, but the drawline method doesn't have an overload with an IA parameter. Thanks, Norvin ...more >>

Hi, Recently I stummbled on an unexpected, weird behavior of Graphics.DrawLine method. This is an example code : Bitmap bmp = new Bitmap(100, 100); Graphics g = Graphics.FromImage(bmp); Point p1 = new Point(int.MaxValue, 0); Point p2 = new Point(0, 0); g.DrawLine(Pens.Black, p1, p2); g....more >>

I've a byte array containing a gif. I need a test to be sure the image is a gif and not a jpg or other format. I try to check this via bitmap.rawformat property, but I cannot. This is my code: Dim stream As New System.IO.MemoryStream(bytesImage) Dim image As New System.Drawing.Bitmap(Draw...more >>

Hi guys I'm trying to save my drawing (lines and rectangles)on a picture box as an bmp file but I got an error which complains something "Object reference not set to an instance of an object" How do I initiate an instance of my object outside my paint event? Could anyone give me some sugges...more >>

Well, I found that by creating a Bitmap from a file using the constructor it places a lock on the file. How do I get around this as mentioned in http://support.microsoft.com/?id=814675? I have an indexed image source. I couldn't find any solution to do this. It's very obscure. I would...more >>

Platform VS.NET 2003, ASP.NET, VB.NET I have quite a few (159) array of points in my code behind that define and draw county boundries of a State Map using the drawpolygon method. I have 2 arrays listed below to provide an example. My idea is to have the regions dynamically change color based on...more >>

Hi again.. And how can I Trim a rect object? Regards Palli ...more >>